Revealing mistake: In "Not Normal" when SpongeBob says "Hmm. This video tape should help," his left arm is missing. (00:01:25)
Starring: Clancy Brown, Tom Kenny, Bill Fagerbakke, Rodger Bumpass
Revealing mistake: In "Not Normal" when SpongeBob says "Hmm. This video tape should help," his left arm is missing. (00:01:25)

Best Day Ever/The Gift of Gum - S4-E20
Revealing mistake: When Squidward says "I suppose if you haven't fixed my clarinet, the concert would have been a bust", Sandy's tail is the same color as her suit.
Spongebob's Last Stand - S7-E22
Mr. Krabs: Alright, Plankton! It's Eugene Krabs, here, with, What's-His-Name! Now come on out!
Plankton: I can't.
Mr. Krabs: Come on outside, and take what's coming to you!
Plankton: I really can't come outside!
SpongeBob: Why not?
Plankton: Because I'm already out here, you bumbling bottom feeders! Open your eyes for crying out loud!
Question: What is the episode when Spongebob is stepping on toy ducks?
Answer: "The Secret Box", or maybe "Karate Choppers".
sadie
Yeah, definitely "Karate Choppers."